Item Serial Number on outer but Base unit of Each

We have a specific business scenario, for example, "Panadol," is typically measured and transacted in its base unit of measure (UOM) as "Each." However, Panadol is packaged and sold in packs containing 20 units (Each). Serial numbers are tracked at the pack level, meaning each pack (containing 20 units) has its own unique serial number. How can we configure our system to effectively record serial numbers at the pack level while transacting in the base unit of measure (Each) during receiving, ensuring that only one serial number is recorded for each pack (equivalent to 20 units)?

is it possible to generate serial at pack level when item base UOM is each and each pack contain 20 each?